Sawing apparatus.



W. R. DAWSON.

SAWING APPARATUS.

APPLICATION 1 11.21) MAR. 24, 1913.

Patented Aug. 25, 1914 2 SHEETS-SHEET 1 INVE NTDR I ATTEIFQNE'Y.

WITNESSES:

if/fl THE NORRIS PETERS CO. PHOTO-LITHOH WASHINGTON. D. C

W. R. DAWSON.

SAWING APPARATUS.

APPLICATION FILED ms. 24, 1913.

1 1 08,71 ,8. Patented Aug. 25, 1914.

2 SHEETS-SHEET 2.

U Figllll IN ENTBL BY K j w ATTuRN Ev.

THE NORRIS PETERS 00.. PHOTO-LITHO. WASHINGTON D. C.

WILLIAM R. DAWSON, or EAST LIvnnrooL, QHIO.

SAWING APPARATUS,

Specification of Letters Patent. Patented A11 25, 1914;.

Application filed March 24, 1913. Serial No. 756,301.

To all whom it may concern: 1

Be it known that 1, WILLIAM R. DAWSON, a citizen of the United States of America,- and resident of East Liverpool, county of Columbiana, and State ofOhio, have invented certain new and useful Improvements in Sawing Apparatus, of which the following is a specification.

This invention relates broadly to improvements in sawing apparatus, and specifically to a machine for sawing steel rails and the like.

The primary object of the invention is to provide a portable machine whereby railway trackrails may be conveniently and expeditiously sawed, as when it is desired to remove a section of such rail.

A further object is to provide a sawing apparatus adapted to be actuated either by hand power or by a small portable electric motor, and the operation of which, when actuated by hand, is accomplished with a minimum of fatiguing labor. And. a still further object is to provide a hack-saw adapted for oscillatory movement.

With these and other important objects in View, the invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be exemplified, reference being had. to the accompanying drawings, torming a part of this specification, in which- Figure 1 is a side elevation of the inven-.

tion applied to the sawing of a railway rail Fig. 2 is a top plan view of the same; Fig. 3 is a rear end view; Fig. 4, is a transverse vertical section on the line 2-2, Fig. 2; and Fig. 5 is a horizontal section on the line 5--5, Fig. 4,.

Referring to said drawings, in which like designating characters distinguish like parts throughout the several views-1 and 2 indicate the opposite track rails of a railway track, the former being that which, as herein depicted, is to be acted upon, as for cet-aching a section thereof. Mounted over said rail 1, and supported in a manner which will hereinafter be exemplified, are two upright parallel members 3 and 4 which serve as guides for an interposed head-piece 5. Said head-piece is supported by and is vertically movable upon a verticallydisposed feed-screw 6 which is'rotatably mounted in a suitable collar-like bearing 7 rigidly mounted between the upper ends of said members 3 and a. The member 3 is provided with a vertically disposed slot 3 through which projects a spindle 8 which is fixed in the head-piece 5. Rotatacle upon the projecting portion of said spindle 8 is a pinion 9 in meshwith a gear wheel 10 which is mountedin fixed relation to an oscillatory hack-saw, generally designated by the numeral 11, said hack-saw comprises a bow-shaped member, which may beconstituted by a pair of oppositely disposed inclined arms 12 joined to a hub 13, and an arcuately curved saw-blade 14 carried by said bow-shaped member, said blade having its opposite ends detachably connected to the opposite ends'of said member, or to the lower ends of said arms 12. The said gear wheel 10 is preferably fixed, as shown, upon an inwardly directed reduced end provided on the hub 13, which latter is mounted to oscillate on a spindle 15 fixed in the headpiece 5 below the spindle 8.

As is apparent, the head-piece 5 is lowered by turning a. hand-wheel 16 fixed on the teed-screw 6 until the saw-blade 14L assumes operative engagement with the rail 1.

Then, by rocking movementof a hand-lever 17 having fixed relation to the pinion 9, oscillatory movement is communicated to said hack-saw. The blade 11- has a curvature corresponding to the arc of a circle whose center is the axis of the spindle 15; consequently, the entire length of the oscillatory stroke is utilized. As the sawing operation progresses, the saw is gradually advanced, or lowered, into the work by manipulation of the teed-screw 6.

For rigidly supporting in working position the parts hereinbetore described, 1 provide a frame which may be of any appropriate character, but which, owing to its comparative simplicity and cheapness, is preferably of the type exemplified in the drawings, in which 18 designates a base member having feet 18 adapted for resting upon the head of rail 1 and having rigidly mounted thereon the upright parallel members 3 and lhereinbefore referred to. Bigidly connected to said base-member 18, as by mounting their ends in sleeve-like eyeportions 19 formed in the latter, is a pair of parallel rods 20, preferably formed o't gas-pipe, which extend transversely across the line of track and have their opposite ends received in sleeve-like eye-portions 21 formed in a member which is adjustable along said rods and is adapted to rest upon ing secured in such position by set-screws 24. Similar lugs 25are11 rovided on the base-member 18 for seating againstfthe inner surface of the head of rail 1, and dogs 26 adjustably mounted on the rod-ends which project outward from the eyeportions 19 are adapted to be set by means of set-screws, 27 in clamping engagement with the outer surface 01 the head of rail 1 in opposing relation to the lugs 25. Connecting therods 20 at a suitable point between the track-rails land 2 is a brace-rod 28, and fixed to the latter are the lower ends of suitably curved brace-rods 29 which have their opposite ends received and firmly held in bearingdike eye-portions 30 formed at the upper ends of the members 3 and 4:.

While I have described my invention more or less in detail, it will be obvious that various mechanical changes may be resorted to without departing from the general spirit or scope of the invention as defined in the appended claims;

Having thus described my invention, what said opposite track rail, a pair of upright members mounted on said base-member, means disposed between said rods and said upright members for bracing the latter, a

vertically movable headpiece disposed between said upright members, means for raising and lowermg sa1d headpiece, an oscillatory hack-saw carried by said head piece, and means for communicating 0s.- cillatory movement to said saw.

2. An apparatus for sawingrailway track rails, comprising a base-member adapted for v resting upon the head of a rail, means for clamping sa1d base member on said rail, a

pair of rods connected to said base-member and extending across to the opposite track rail, means 'adjustably mounted on said rods for assumlng clamping engagement with said opposite track rail, apairoi upright members mounted on said base-member,

curved saw blade having its ends attached to said arms, a lever pivotally mounted on said head-piece, and means whereby power applied to said lever effects the oscillation of said hub.

In testimony whereof, I afiiX mysignatuie in presence of two subscribing witnesses.

' WILLIAW R. DAWSON.

Nitnessesz- I Anna E. CLENDENNING, Wnennn Tarenmronsr;

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

